Sucking atomizer for gasoline-oxygen cutting-welding

ABSTRACT

A jet-inducing atomizer for gasoline-oxygen cutting-welding comprises a main body, a diffusion tube, a preheating oxygen fine-tube and a gasoline fine-tube. The diffusion tube and the preheating oxygen fine-tube are provided at the center of the main body co-axially, and communicated with each other. The gasoline fine-tube enters the main body from one side of the main body, and is communicated with the diffusion tube. The diffusion tube is a conical tube. The coarse end of the conical tube is coincidence with the end face of the body. The fine end of the conical tube is connected with the preheating oxygen fine-tube. The advantages of the gasoline-oxygen cutting machine are as follows: the operation is easy as the gasoline tank needs not be pressurized; there is no leak of gasoline or jet of gasoline in leaking manner during operation. The atomized mixture of gasoline and oxygen is immediately jetted while the oxygen valve is opened, and gasoline is immediately shut off while the oxygen valve is closed. Therefore, safety of operation is increased and the cost is reduced.

FIELD OF INVENTION

The present invention relates to a jet-inducing atomizer for gasoline -oxygen cutting-welding, and belongs to machining field.

BACKGROUND OF INVENTION

At present, a series of gasoline-oxygen cutting machines invented by the present applicant can cut steel materials having various thickness. Said cutting machines consist of a cutting nozzle, a special cutting torch and a pressure-stabilized gasoline supply tank, etc. (c.f. ZL95211651.0, ZL94247487.2 and ZL97250604.7). The cutting machines according to said patents have the following deficiencies: when gasoline passes from the gasoline tank to the torch and nozzle by compressed air, the atomizing of gasoline in the cutting torch is not perfect; gasoline often leaks from the outlet of the nozzle while the operation is not appropriate; and gasoline may leak or jet in leaking manner, thus causing unsafety in case the rubber tube connecting the gasoline tank and the cutting torch breaks.

SUMMARY OF INVENTION

The object of invention is to provide a jet-inducing atomizer for gasoline -oxygen cutting-welding. Based on the principle of hydrodynamics, the atomizer is mounted in the cutting torch, gasoline is sucked from the gasoline tank by an oxygen jet stream under high speed, and is atomized in the cutting torch and the cutting nozzle, and mixed with oxygen, and the mixture is then jetted from the cutting nozzle for ignition to obtain a cutting flame.

A Jet-inducing atomizer for gasoline-oxygen cutting-welding according to the present invention comprises a main body of the atomizer, a diffusion tube, a preheating oxygen fine-tube and a gasoline fine-tube. The diffusion tube and the preheating oxygen fine-tube are provided at the center of the main body co-axially, and communicated with each other. The gasoline fine-tube enters the main body from one side of the main body, and is communicated with the diffusion tube. The diffusion tube is a conical tube. The coarse end of the conical tube is coincident with the end face of the body. The fine end of the conical tube is connected with the preheating oxygen fine-tube. The taper α₁ of the conical tube equals to 5°-10°. The length 1₀ of the conical tube is 2-5 times of the length 1₁ of the preheating oxygen fine-tube, i.e. 1₀=(2-5) 1. The length 1₁ of the preheating oxygen fine-tube is 3-5 mm. The distance 1₂ between the intersection point of the gasoline fine-tube with the diffusion tube and the connection point of the diffusion tube with the preheating oxygen tube equals to 2-8 mm.

In the atomizer as mentioned above, the angle α₂ between the gasoline fine-tube and the perpendicular surface of the diffusion tube equals to 0-450. The diameter d₁ of the preheating oxygen fine-tube equals to 0.5-2.5 mm. The diameter d₂ of the small end of the diffusion tube equals to 1.5-3 mm. The diameter d₃ of the gasoline fine tube equals to 0.5-2 mm.

The atomizer of the present invention is fixed at the head of the cutting torch or in the preheating oxygen tube. After the preheating oxygen tube is opened, gasoline is sucked into the cutting torch and atomized to obtain cutting flame which is combusted sufficiently, has concentrated flame and is easy to be adjusted. The obvious advantages of the gasoline-oxygen cutting machine according to the invention are as follows: the operation is easy as the gasoline tank needs not be pressurized; there is no leak of gasoline or jet of gasoline in leaking manner during operation. The atomized compound of gasoline and oxygen is immediately jetted while the oxygen valve is opened, and gasoline is immediately shut off while the oxygen valve is closed. Therefore, safety of operation is increased and the cost is reduced.

DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic view of structure of the jet-inducing atomizer for gasoline-oxygen cutting-welding according to the invention;

FIGS. 2-4 are schematic views of three kinds of structures of gasoline-oxygen cutting torch used with the jet-inducing atomizer for gasoline oxygen cutting-welding according to the invention;

PREFERRED EMBODIMENTS OF INVENTION

The invention will be described in details with reference to the drawings. In FIG. 1, the reference numeral 1 denotes a main body of the Jet-inducing atomizer; 2—a gasoline inlet; 3—a preheating oxygen inlet; 4—a preheating oxygen fine-tube; 5—a gasoline fine-tube; 6—a diffusion tube. FIGS. 2-4 are schematic views of three kinds of structures of gasoline-oxygen cutting torch used with the jet-inducing atomizer for gasoline-oxygen cutting-welding. In FIGS. 2-4, the reference numeral 7 denotes a gasoline feeding tube; 8—an oxygen feeding tube; 9—a gasoline fine-adjusting valve; 10—a main body of a cutting torch; 11—a cutting oxygen tube; 12—a connector of the cutting nozzle; 13—a cutting nozzle; 14—a preheating oxygen valve; 15—a cutting oxygen valve; and 16—a preheating oxygen tube.

As shown in FIG. 1, the jet-inducing atomizer for gasoline-oxygen cutting-welding according to the invention comprises a main body 1 of the atomizer, a diffusion tube 6, a preheating oxygen fine-tube 4 and a gasoline fine-tube 5. The diffusion tube 6 and the preheating oxygen fine-tube 4 are provided at the center of the main body 1 co-axially, and communicated with each other. The gasoline fine-tube 5 enters the main body from one side of the main body, and is communicated with the diffusion tube 6. The diffusion tube is a conical tube. The coarse end of the conical tube is coincident with the end face of the main body. The fine end of the conical tube is connected with the preheating oxygen fine-tube. The taper α₁ of the conical tube equals to 5°-10°. The length 1₀ of the conical tube is 2-5 times of length 1₁ of the preheating oxygen fine-tube, i.e. 1₀=(2-5) 1₁. The length 1₁ of the preheating oxygen fine-tube is 3-5 mm. The distance 1₂ between the intersection point of the gasoline fine-tube with the diffusion tube and the connection point of the diffusion tube and the preheating oxygen tube equals to 2-8 mm.

The operating principle of the atomizer of the invention is as follows: the oxygen flow is accelerated while the preheating oxygen enters the fine-tube 4 from the inlet 3, the oxygen flow is then enters the diffusing tube and produces a negative pressure at the outlet of the gasoline tube 5, and the suction force is increased to suck the gasoline into the diffusion tube 6 to co-act with the oxygen flow under high speed. The gasoline is atomized and mixed with oxygen. The mixture is jetted from the diffusing tube to enter the cutting nozzle for igniting.

The parameters of one embodiment of the invention are as follows: the diameter of the preheating oxygen fine-tube is 0.8 mm; the length of the preheating fine-tube is 4 mm; the diameter of the gasoline fine-tube is 1.5 mm; the diameter of the small end of the diffusion tube is 2 mm; the length of the diffusion tube is 12 mm; the taper of the diffusion tube is 6°; and the distance between the outlet of the gasoline fine-tube entering the diffusion tube and the outlet of the preheating oxygen fine-tube is 3 mm. As shown in FIG. 2, the atomizer is provided in the connector of the cutting nozzle 12. A solid metal rod having a diameter of 1 mm less than the inner diameter of the gasoline feeding tube is fixed in the gasoline feeding tube 7 to feed gasoline into the gasoline fine-tube via an inclined opening on the connector 12. The preheating oxygen tube 16 is communicated with the inlet of oxygen of the atomizer. The outlet of the diffusion tube is communicated with the chamber in the head of the cutting nozzle 13. In this embodiment, the diameter of the preheating oxygen fine-tube is 0.8 mm; the diameter of the gasoline fine-tube is 1.5 mm; the diameter of the small end of the diffusion tube is 2 mm; the taper of the diffusion tube is 6°; and the length of the diffusion tube is 12 mm. As shown in FIG. 3, the atomizer is fixed in the preheating tube 16. The oxygen inlet is connected with the preheating oxygen tube in the main body of the cutting torch. The gasoline feeding tube 7 feeds the gasoline into the gasoline fine-tube. The outlet of the diffusion tube is communicated with the chamber at the upper part of the cutting nozzle 13.

In this embodiment, the diameter of the preheating oxygen fine-tube 4 is 0.8 mm; the length of the preheating oxygen fine-tube is 3 mm; the diameter of the gasoline fine-tube 5 is 1.5 mm; the diameter of the diffusion tube 6 is 2 mm; and the length of the diffusion tube is 12 mm. As shown in FIG. 4, the atomizer of the invention is used for a distributor head of a semi-automatic cutting machine. The atomizer is provided at the connection of the preheating oxygen tube 16 and the connector of the cutting torch. The gasoline fine-tube is communicated with the gasoline feeding tube 7. The preheating oxygen fine-tube is communicated with the preheating oxygen tube 16. The outlet of the diffusion tube is communicated with the chamber at the head of the cutting nozzle 13. In this embodiment, the diameter of the preheating oxygen fine-tube 4 is 0.9 mm; the length of the preheating oxygen fine-tube 4 is 3 mm; the diameter of the gasoline fine-tube 5 is 1.5 mm; the taper of the diffusion tube is 6°; the diameter of the small end of the diffusion tube is 2 mm; and the length of the diffusion tube is 12 mm.

Industrial Application

The present invention can be used for cutting, such as cutting the steel materials having various thickness. 

1. A jet-inducing atomizer for gasoline-oxygen cutting-welding comprising a main body of the atomizer, a diffusion tube, a preheating oxygen fine-tube and a gasoline fine-tube, the diffusion tube and the preheating oxygen fine-tube being provided at the center of the main body co-axially, and communicated with each other, the gasoline fine-tube entering the main body from one side of the main body, and being communicated with the diffusion tube, the diffusion tube being a conical tube, the coarse end of the conical tube being coincident with the end face of the body, the fine end of the conical tube being connected with the preheating oxygen fine-tube, the taper α₁ of the conical tube equaling to 5°-10°, the length 1₀ of the conical tube being 2-5 tines of length 1₁ of the preheating oxygen fine-tube, i.e. 1₀=(2-5) 1₁, the length 1₁ of the preheating oxygen fine-tube being 3-5 mm, the distance 1₂ between the intersection point of the gasoline fine-tube with the diffusion tube and the connection point of the diffusion tube and the preheating oxygen tube equaling to 2-8 nun.
 2. The atomizer as cited in claim 1, wherein the angle α₂ between the gasoline fine-tube and the perpendicular surface of the diffusion tube equals to 0-45°.
 3. The atomizer as cited in claim 1, wherein the diameter d₁ of the preheating oxygen fine-tube equals to 0.5-2.5 mm.
 4. The atomizer as cited in claim 1, wherein the diameter d₂ of the small end of the diffusion tube equals to 1.5-3 mm.
 5. The atomizer as cited in claim 1, wherein the diameter d₃ of the gasoline fine tube equals to 0.5-2 mm. 